X4 froze loading custom tune
05-16-2019, 11:52 AM
#11
Senior Member
Glad to see my suggestion resolved your issues 
As far as the previous tuner not adjusting cam angles, that's madness. It's 100% required on a supercharged setup and as little as 5-10 degrees can make as big a difference as 40-50 horsepower sometimes. Superchargers should have a linear power to essentially the rev limit. If they aren't the cam angles are wrong.
As far as the previous tuner not adjusting cam angles, that's madness. It's 100% required on a supercharged setup and as little as 5-10 degrees can make as big a difference as 40-50 horsepower sometimes. Superchargers should have a linear power to essentially the rev limit. If they aren't the cam angles are wrong.
05-17-2019, 06:45 AM
#12
Originally Posted by rojizostang
My butt dyno isn't sensitive enough to say positively
we did a lot of datalogging, and in the short term everything is sorted out. I couldn't get a good final pull from a dig in drive because of too much tire spin, so after we put the driveshaft in it tomorrow, i'll bolt on the drag radials and do a little more logging for him. it's my experience that it will shift at a lot lower rpm with the drag tires than the street tires because there's no slippage. I anticipate adjusting the shift points to accommodate the drag tires. he plans for it to shift at 7500 rpm. I expressed a few concerns about shifting a gen I coyote that high, and he said simply he's been doing it a long time.
hopefully he made cam timing adjustments that will allow the motor to run higher in the rpm range than the last tune and I can cash in with better et's. The last tuner made no cam timing adjustments period.
we did a lot of datalogging, and in the short term everything is sorted out. I couldn't get a good final pull from a dig in drive because of too much tire spin, so after we put the driveshaft in it tomorrow, i'll bolt on the drag radials and do a little more logging for him. it's my experience that it will shift at a lot lower rpm with the drag tires than the street tires because there's no slippage. I anticipate adjusting the shift points to accommodate the drag tires. he plans for it to shift at 7500 rpm. I expressed a few concerns about shifting a gen I coyote that high, and he said simply he's been doing it a long time.
hopefully he made cam timing adjustments that will allow the motor to run higher in the rpm range than the last tune and I can cash in with better et's. The last tuner made no cam timing adjustments period.
05-17-2019, 07:22 AM
#13
Senior Member
Thread Starter
7500 is quite high for a gen 1, did you do OPG's with the blower? Check your logs to see if you're hitting the limiter. I believe you will see torque source code 4 show up and you'll see throttle close. I seem to be good up to about 7550ish over that I hit the limiter. Maybe go 7400 to be safe lol. I think upgrading the pulse ring helps our 12th gens in the higher rpms to not lose cam signal? I could be mistaken on how that works.
Well I don't know....Matt Alderman is supposed to be the coyote tuning god. He knows that the long block is completely stock with the exception of adding the '18gt dampener. Like he said...."been doing this a long time"
Ultimately the decisions are mine, however at some point I have to give way to those that have huge amounts of experience.
05-17-2019, 08:47 AM
#14
Originally Posted by rojizostang
Well I don't know....Matt Alderman is supposed to be the coyote tuning god. He knows that the long block is completely stock with the exception of adding the '18gt dampener. Like he said...."been doing this a long time"
Ultimately the decisions are mine, however at some point I have to give way to those that have huge amounts of experience.
Ultimately the decisions are mine, however at some point I have to give way to those that have huge amounts of experience.
05-17-2019, 04:50 PM
#15
I hear ya 100% I know nothing compared to guys like that! Just sharing my experience with the limiter. And for what it's worth my truck seems to shift a tad higher at the track compared to when I'm getting wot logs on the street.. I have no clue why?? I correct the tire size with my livewire device but I see a few hundred more rpm on the strip with my drag radials on.
05-17-2019, 05:21 PM
#16
Originally Posted by BadCon
Are you getting trans slip on the shift that is causing an RPM overrun? Mine does this on the 3-4 shift when I'm in 4x4....otherwise the minor slip would be absorbed by the tires in 2wd.